Free antivirus: AVG Free, Avast, Antivir:
http://www.avast.com/eng/down_home.html (avast)
http://www.grisoft.com/doc/40/lng/us/tpl/tpl01 (avg)
www.free-av.com/antivirus/allinonen.html (antivir)
Free firewall: Zonealarm is highly regarded:
http://www.zonelabs.com
But there are others jst as good, like sygate
http://smb.sygate.com/products/spf_standard.htm
and kerio
http://www.kerio.com/kpf_download.html
Moreover, AVG has an integrated antivirus/firewall offering nowadays, but I don't know if it's free. There's no read advantage of using those different applications from the same manufacturer.
Study, compare and choose one.
Personally, I use AVG and Avast on two different machines, and Zonealarm (Windows 98 and Windows XP firewall, but being behind a router already makes the firewall less important. In fact, the p2p-software my son uses seems to make Windows unstable in combination with my very old version of Zonealarm, so it's routinely disabled without harmful side-effects.
If you now use Norton or McAfee, be aware that those might be DIFFICULT to completely remove. Ask for help here if necessary.
Hope this helps. Others will give their own recommendations.
Kees
I would like to know which antivirus and firewalls are available FREE, since the one I purchased will expire soon. If they are as good, then there's no sense paying for one.
Any suggestions?

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